P
US8889766B2ActiveUtilityPatentIndex 37

Thin glassy polymer films including spherical nanoparticles

Assignee: KYSAR JEFFREY WILLIAMPriority: Mar 1, 2011Filed: Mar 1, 2012Granted: Nov 18, 2014
Est. expiryMar 1, 2031(~4.7 yrs left)· nominal 20-yr term from priority
Inventors:KYSAR JEFFREY WILLIAMKUMAR SANAT KFRAGNEAUD BENJAMINMAILLARD DAMIEN
C08L 51/10B82Y 30/00C08L 25/06C08F 292/00Y10S977/773
37
PatentIndex Score
1
Cited by
32
References
21
Claims

Abstract

A method of forming a solid-state polymer can include grafting a graft polymer to nanoparticles to provide grafted nanoparticles, and dispersing the grafted nanoparticles in a polymer matrix to provide a specified loading of the grafted nanoparticles within the polymer matrix to form a solid-state polymer. A solid-state polymer can include grafted nanoparticles comprising a polymer graft grafted to nanoparticles, and a polymer matrix, in which the grafted nanoparticles are dispersed to form a solid-state polymer, the dispersion configured to provide a specified loading of the grafted nanoparticles within the solid-state polymer.

Claims

exact text as granted — not AI-modified
The claimed invention is: 
     
       1. A method of forming a solid-state polymer, the method comprising:
 grafting a graft polymer to nanoparticles to provide grafted nanoparticles; and dispersing the grafted nanoparticles in a polymer matrix to provide a specified loading of the grafted nanoparticles within the polymer matrix to form a solid-state polymer, wherein the solid state polymer has an elastic modulus from about 3.5 GPa to 4.6 GPa, a yield stress from about 21 mPa to about 25.5 MPa, and a strain-to-failure from about 2% elongation to about 4.75% elongation. 
 
     
     
       2. The method of  claim 1 , wherein the solid-state polymer has an increased modulus, an increased yield stress, and an increased strain-to-failure compared to the polymer matrix without the grafted nanoparticles dispersed therein. 
     
     
       3. The method of  claim 1 , wherein the specified loading is below a percolation threshold concentration of the grafted nanoparticles within the polymer matrix. 
     
     
       4. The method of  claim 1 , wherein the specified loading is less than 7 weight percent grafted nanoparticles within the polymer matrix. 
     
     
       5. The method of  claim 1 , wherein the specified loading is about 5 weight percent grafted nanoparticles in the polymer matrix. 
     
     
       6. The method of  claim 1 , wherein dispersing the grafted nanoparticles comprises forming a spatially uniform dispersion of the grafted nanoparticles within the polymer matrix. 
     
     
       7. The method of  claim 1 , wherein the nanoparticles include silica nanoparticles. 
     
     
       8. The method of  claim 1 , wherein the graft polymer is immiscible within the polymer matrix. 
     
     
       9. The method of  claim 1 , wherein the graft polymer is miscible within the polymer matrix. 
     
     
       10. The method of  claim 1 , wherein the graft polymer includes polystyrene. 
     
     
       11. The method of  claim 1 , wherein the polymer matrix includes a homo-polystyrene matrix. 
     
     
       12. A solid-state polymer comprising:
 grafted nanoparticles comprising a graft polymer grafted to nanoparticles; and 
 a polymer matrix, in which the grafted nanoparticles are dispersed to form a solid-state polymer, the dispersion configured to provide a specified loading of the grafted nanoparticles within the solid-state polymer, 
 wherein the solid state polymer has an elastic modulus from about 3.5 GPa to 4.6 GPa, a yield stress from about 21 mPa to about 25.5 MPa, and a strain-to-failure from about 2% elongation to about 4.75% elongation. 
 
     
     
       13. The solid-state polymer of  claim 12 , wherein the solid-state polymer has an increased modulus, an increased yield stress, and an increased strain-to-failure compared to the polymer matrix without the grafted nanoparticles dispersed therein. 
     
     
       14. The solid-state polymer of  claim 12 , wherein the specified loading is below a percolation threshold concentration of the grafted nanoparticles. 
     
     
       15. The solid-state polymer of  claim 12 , wherein the specified loading is less than 7 weight percent grafted nanoparticles in the polymer matrix. 
     
     
       16. The solid-state polymer of  claim 12 , wherein the specified loading is about 5 weight percent grafted nanoparticles in the polymer matrix. 
     
     
       17. The solid-state polymer of  claim 12 , wherein the solid state-polymer is an amorphous solid-state polymer. 
     
     
       18. The solid-state polymer of  claim 12 , wherein the specified loading is below the percolation threshold concentration of the nanoparticles. 
     
     
       19. The solid-state polymer of  claim 12 , wherein the nanoparticles include silica nanoparticles. 
     
     
       20. The solid-state polymer of  claim 12 , wherein the graft polymer includes polystyrene. 
     
     
       21. The solid-state polymer of  claim 12 , wherein the polymer matrix includes a homo-polystyrene matrix.

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